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- W2951051360 abstract "Wearable ultrasound sensing could enable novelmedical diagnostics by facilitating continuous, real-time, anddirect measurement of physiological phenomena, such as bloodpressure. Currently, ultrasound is not used in wearable healthsensing applications because clinical ultrasound systems areexpensive, bulky, and require high operating power. Realizingwearable ultrasound therefore requires significant reductions incost, size, and power consumption. Manufacturing cost is ofparticular concern because sensors are frequently incorporated intoconsumer goods, where cost is a key driver of technology adoption.Toward that goal, this thesis explored the first steps toward theopportunity to fabricate low-cost ultrasound transducers by contactprinting. Contact printing was selected because it could be scaledfor high-throughput manufacturing, and it could be performed atambient temperature and pressure. For this thesis, a capacitivemicroscale ultrasound transducer was fabricated by contact printinga gold-parylene composite flexible membrane onto a silicon chipsubstrate. Significant challenges with the adhesion between themembrane and the chip were overcome during fabrication processdevelopment and a high yield process for the contact printing stepwas developed. The transducer was characterized forelectromechanical performance. The first mode resonant frequency ofthe transducer was 2.2MHz, with a 2MHz bandwidth, placing it in therange of interest for medical ultrasound applications (typically1-15MHz). These results demonstrate that flexible membraneultrasound transducers can be fabricated. Furthermore, theyilluminate a path toward wearable ultrasound sensing and morebroadly, flexible medical devices." @default.
- W2951051360 created "2019-06-27" @default.
- W2951051360 creator A5007207031 @default.
- W2951051360 date "2018-01-01" @default.
- W2951051360 modified "2023-09-24" @default.
- W2951051360 title "Design and fabrication of a flexible membraneultrasound transducer" @default.
- W2951051360 hasPublicationYear "2018" @default.
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